>> still to come we're going to look back at the rich exploratorium. blp >> if you'd like to take a look at the exploratorium, you have a chance to do it. it's going reopen so admission at the old building is free for now. dan ashley takes a look back in this assignment 7 report. >> the palace of fine arts built for 1915 exposition. made to look like a ancient ruin with a huge display hall. late yes, it would be reborn as a new museum. >> a tornado. you helped make a tornado. >> the man with the idea was frank oppenheimer. >> the point to make it possible for people to feel they can understand the world around them. i think a lot of people have given up with that understanding. >> frank died in 1985 but his legacy is alive both in museum, and in documentaries, including one by john elts. he was a pioneer of the hands on museum instead of don't touch me, touching was essential. first it was a hard sell it was a new idea he used to carry an exhibit around to show people what he meant by a science museum exhibit. >> thejl publicity. these pictures are fro